I don't believe it does. My 30mm Touit does not support PDAF, yet in AF-C mode with Wide focus area, I get flashing green squares in the Center AF area. Clearly this does not show that PDAF is available, because everyone agrees the Touit does not use PDAF. From your description, the Sigma acts the same way.

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Dan

My Touits work with PDAF in center. In AFC wide I get the tiny squares in the center indicating PDAF.

You should tell Zeiss about this, because they say that PDAF will only be available after a FW update. Seriously though, what makes you think that the green points lighting up in AF-C mode are PDAF points, and not CDAF points? Common sense says they are CDAF points, like you would see on a camera without PDAF.

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Dan

Sigma lenses will get full frame PDAF capability with the update. --'I am ze locksmith of love, no?'Stephen Reed